Nondestructive analysis of thick-target specimens by γ-ray backscatter

1989 ◽  
Vol 67 (8) ◽  
pp. 827-835 ◽  
Author(s):  
I. K. MacKenzie
Keyword(s):  
Research Program ◽  
Thick Target ◽  
Historical Background ◽  
Axially Symmetric ◽  
Nondestructive Analysis ◽  
Electron Momentum ◽  
Momentum Spectra ◽  
Symmetric Geometry ◽  
Γ Ray

A multipurpose X- and γ-ray spectrometer for nondestructive analysis is described. It achieves high throughput through its axially symmetric geometry. Its evolution from a research program in positron annihilation is outlined as is its historical background in the determination of electron-momentum spectra. Several applications are discussed but special attention is paid to the nondestructive analysis of the new Canadian dollar coin.

scholarly journals Universal Synthesizer of Mueller Matrices Based on the Symmetry Properties of the Enpolarizing Ellipsoid

Symmetry ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 983
Author(s):  
José J. Gil ◽  
Ignacio San José
Keyword(s):  
Mathematical Structure ◽  
Mueller Matrix ◽  
Morphological Properties ◽  
Nondestructive Analysis ◽  
Structural Decomposition ◽  
Symmetry Properties ◽  
Mueller Matrices ◽  
Scattering Measurement ◽  
The Way

Polarimetry is today a widely used and powerful tool for nondestructive analysis of the structural and morphological properties of a great variety of material samples, including aerosols and hydrosols, among many others. For each given scattering measurement configuration, absolute Mueller polarimeters provide the most complete polarimetric information, intricately encoded in the 16 parameters of the corresponding Mueller matrix. Thus, the determination of the mathematical structure of the polarimetric information contained in a Mueller matrix constitutes a topic of great interest. In this work, besides a structural decomposition that makes explicit the role played by the diattenuation-polarizance of a general depolarizing medium, a universal synthesizer of Muller matrices is developed. This is based on the concept of an enpolarizing ellipsoid, whose symmetry features are directly linked to the way in which the polarimetric information is organized.

The precision determination of some γ-ray energies using a β-spectrometer

1965 ◽  
Vol 63 (3) ◽  
pp. 353-382 ◽  
Author(s):  
G. Murray ◽  
R.L. Graham ◽  
J.S. Geiger
Keyword(s):  
Precision Determination ◽  
Γ Ray

The determination of boron in sedimentary rocks by neutron irradiation and prompt γ-ray spectrometry

1980 ◽  
Vol 57 (2) ◽  
pp. 525-533 ◽  
Author(s):  
S. A. Kerr ◽  
W. V. Prestwich ◽  
T. J. Kennett ◽  
D. M. Shaw
Keyword(s):  
Neutron Irradiation ◽  
Sedimentary Rocks ◽  
Γ Ray

scholarly journals An Analytical Method for the Determination of Temperature Distribution in Short Journal Bearing Oil Film

Symmetry ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 539
Author(s):  
Nebojsa Nikolic ◽  
Zivota Antonic ◽  
Jovan Doric ◽  
Dragan Ruzic ◽  
Stjepan Galambos ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Hydrodynamic Lubrication ◽  
Oil Film ◽  
Symmetric Geometry ◽  
Experimental Values ◽  
Operating Regimes ◽  
Level Of Agreement

The aim of this paper is to derive an equation for the temperature distribution in journal bearing oil film, in order to predict the thermal load of a bearing. This is very important for the prevention of critical regimes in a bearing operation. To achieve the goal, a partial differential equation of the temperature field was first derived, starting from the energy equation coupled with the Reynolds equation of hydrodynamic lubrication for a short bearing of symmetric geometry. Then, by solving the equation analytically, the function of temperature distribution in the bearing oil film has been obtained. The solution is applied to the journal bearing, for which the experimental data are available in the references. Finally, the obtained results have been compared to the corresponding experimental values for two operating regimes, and a good level of agreement was achieved.

Determination of Integrated Reflecting Power of Silicon Crystal by Means of Mössbauer γ-Ray Diffraction

1983 ◽  
Vol 22 (Part 2, No. 1) ◽  
pp. L49-L51 ◽  
Author(s):  
Yasuji Kashiwase ◽  
Masayuki Minoura
Keyword(s):  
Silicon Crystal ◽  
Γ Ray

Determination of F, Na, Mg, Al and P in Indian tea powders by a proton induced γ-ray emission technique

2016 ◽  
Vol 8 (39) ◽  
pp. 7116-7123 ◽  
Author(s):  
Y. Sunitha ◽  
A. Sarkar ◽  
Sanjiv Kumar
Keyword(s):  
High Sensitivity ◽  
Light Elements ◽  
Γ Ray ◽  
Indian Tea

The high sensitivity of proton induced γ-ray emission technique to light elements is exploited to determine F, Na, Mg, Al and P in several Indian tea powders.

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